BPC-157 (Pentadecapeptide)
BPC-157 vs TB-500: Research Comparison
Reviewed by our laboratory team · Last updated 2026-07-03
BPC-157 and TB-500 are distinct research peptides. BPC-157 is a 15-residue pentadecapeptide from a gastric protective protein; TB-500 is a synthetic fragment of Thymosin Beta-4 targeting actin sequestration. They differ in origin, sequence, and studied mechanism.
Key facts
- BPC-157
- 15 aa, gastric-juice-derived
- TB-500
- Tβ4 fragment, actin binding
Are they compared in the literature?
Direct head-to-head peer-reviewed studies are limited. Some grey literature discusses combined research protocols, but peer-reviewed evidence is sparse.
Quick reference
| Feature | BPC-157 | TB-500 |
|---|---|---|
| Length | 15 aa | Fragment of 43 aa parent |
| Origin | Gastric juice protein | Thymosin Beta-4 |
| Mechanism | Multi-pathway | Actin sequestration |
| Approval | None | None |
Extended research context
The BPC-157 (Pentadecapeptide) deep dive
Deep dive: the pentadecapeptide sequence
BPC-157 is a synthetic pentadecapeptide with the sequence Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val. It is derived from a fragment identified in human gastric juice by the Zagreb research group (Sikirić and colleagues), whose body of published work spans three decades and covers models ranging from tendon repair to gut integrity. The 'BPC' initials stand for 'body protection compound' — the group's original characterisation term.
Two forms: acetate salt vs arginate
BPC-157 is supplied most commonly as an acetate salt; a small subset of suppliers offer the arginate form, which has slightly different solubility and stability properties. For research reproducibility, keep the salt form consistent across a study and confirm which form the CoA specifies (mass ± counterion changes the reading).
Reading a BPC-157 CoA
A trustworthy BPC-157 CoA lists HPLC purity (target ≥98% area), mass-spec confirmation (~1,419 Da for the free peptide), water content (Karl Fischer), acetate content, and residual solvents. Some batches also include endotoxin data. Any missing category is a red flag for a compromised supply chain.
Research applications
- ▸Cell-culture models of gut epithelial integrity
- ▸Tendon fibroblast migration and collagen-synthesis assays
- ▸Angiogenesis models involving VEGF and NO signalling
- ▸Stability studies comparing acetate vs arginate salt forms
- ▸Analytical reference for pentadecapeptide HPLC methods
Handling checklist
- ✓Store lyophilised vial at −20 °C long-term (2–8 °C short-term)
- ✓Reconstitute with bacteriostatic water; a 5 mg vial dissolves cleanly
- ✓Aliquot reconstituted solution; keep refrigerated 2–8 °C, use within 28 days
- ✓Protect from light and repeated warming
- ✓Verify CoA: HPLC ≥98%, mass ~1,419 Da, salt form declared
Common research-handling mistakes
Learnt from thousands of researcher orders across our UK labs.
✗ Mixing acetate and arginate BPC-157 across a study
Fix: Choose one salt form and stay with it — different masses and solubility.
✗ Assuming stability at room temperature
Fix: Refrigerate reconstituted solution; discard after 28 days.
✗ Buying without a CoA
Fix: Only source from suppliers that publish batch HPLC + mass-spec data.
Continue researching
Peer-reviewed guides, comparators and matched reference materials.
Related questions researchers ask
- What does BPC-157 stand for?
- Is BPC-157 the same as pentadecapeptide?
- Who discovered BPC-157?
- What is the difference between BPC-157 acetate and arginate?
- How is BPC-157 reconstituted for research?
Frequently asked questions
- Which is 'better'?
- Neither is approved. Both are investigational with distinct proposed mechanisms.
Primary sources & clinical trials
Peer-reviewed research and registered trials from PubMed, ClinicalTrials.gov, PubChem, FDA and NIH. All links open in a new tab (external, rel="nofollow").
- PubMedPubMed — BPC-157 vs TB-500pubmed.ncbi.nlm.nih.gov
- PubMedSikirić et al., Stable Gastric Pentadecapeptide BPC-157 — Curr Pharm Des 2018 (PMID 29786490)pubmed.ncbi.nlm.nih.gov
- PubMedChang et al., BPC-157 accelerates Achilles tendon-to-bone healing — J Appl Physiol 2011 (PMID 21030674)pubmed.ncbi.nlm.nih.gov
- PubMedCerovecki et al., Pentadecapeptide BPC-157 promotes ligament healing — J Orthop Res 2010 (PMID 19725106)pubmed.ncbi.nlm.nih.gov
- PubMedSeiwerth et al., BPC-157 and blood vessels — Curr Pharm Des (PMID 25373685)pubmed.ncbi.nlm.nih.gov
- PubChemPubChem · BPC-157 (CID 71300630)pubchem.ncbi.nlm.nih.gov
- PubMedNIH PubMed — Complete BPC-157 literature (Sikiric group)pubmed.ncbi.nlm.nih.gov
- GuidelineGoogle — Creating helpful, reliable, people-first contentdevelopers.google.com
More BPC-157 (Pentadecapeptide) articles
- What Is BPC-157? Research OverviewBPC-157 is a synthetic pentadecapeptide derived from a protein isolated in human gastric juice. Structure, mechanism and research history summarised.
- BPC-157 Peptide: Structure and SequenceBPC-157 structure: 15-amino-acid pentadecapeptide with sequence GEPPPGKPADDAGLV. Rich in proline residues, contributing to unusual stability.
- What Does BPC-157 Stand For?BPC-157 stands for 'Body Protection Compound 157' — a name coined by the Zagreb research group describing its studied protective effects.
- BPC-157 Mechanism: Multi-Pathway ResearchBPC-157 mechanism research: multiple pathways proposed including nitric oxide system modulation, growth-factor interactions, and angiogenesis.
- BPC-157 and the Gastric Juice OriginBPC-157's parent protein was identified in human gastric juice. The 15-residue synthetic fragment is derived from this larger native protein.
Popular across the research hub
One flagship guide from every other research category — keep exploring.
- Retatrutide ResearchWhat Is Retatrutide? Complete Research OverviewRetatrutide (LY3437943) is an investigational triple-receptor agonist peptide developed by Eli Lilly. It binds and activates the GIP, GLP-1, and glucagon receptors simultaneously, making it the first triple-agonist incretin currently progressing through the Phase 3 TRIUMPH clinical trial programme.
- GHK-Cu (Copper Peptide)What Is GHK-Cu? Copper Peptide Research OverviewGHK-Cu is a naturally occurring copper-binding tripeptide consisting of glycine, histidine, and lysine complexed with a copper(II) ion. It was discovered in 1973 by Loren Pickart and is widely studied in the peer-reviewed literature for its roles in gene expression, wound repair models, and extracellular matrix biology.
- TB-500 (Thymosin β4 fragment)What Is TB-500? Research OverviewTB-500 is a synthetic peptide corresponding to the active actin-binding region of Thymosin Beta-4 (Tβ4), a naturally occurring 43-residue protein. It is studied in the peer-reviewed literature primarily for actin sequestration, cell migration, and angiogenesis in in vitro and animal models.
- CJC-1295 & IpamorelinWhat Is CJC-1295? Research OverviewCJC-1295 is a synthetic growth-hormone-releasing hormone (GHRH) analogue originally developed by ConjuChem. It exists in two research forms: with Drug Affinity Complex (DAC), which extends half-life via albumin binding, and without DAC (also called Modified GRF 1-29), which has a much shorter half-life.
- Peptide ReferenceWhat Are Peptides? Complete GuidePeptides are short chains of amino acids connected by peptide (amide) bonds. Typically fewer than 50 residues, they occupy the middle ground between single amino acids and proteins. Peptides serve as hormones, signalling molecules, structural fragments, and — increasingly — as research and therapeutic targets.
- Bacteriostatic WaterWhat Is Bacteriostatic Water?Bacteriostatic water is sterile water containing 0.9% benzyl alcohol as a bacteriostatic preservative. The benzyl alcohol inhibits bacterial growth after the vial's initial puncture, making the same vial suitable for repeated withdrawal in research handling. It is not the same as plain sterile water.